Control device

Abstract

A control device for a rotating electrical machine, which is able to reduce a tracking delay of an actual output torque and actual currents with respect to a fluctuating torque command and fluctuating current commands and to reduce steady state deviations, is obtained. The control device includes a torque current computing unit; an actual current computing unit; a current feedback control unit; and a voltage control unit that controls voltages on the basis of the two-phase voltage commands. The torque command includes a fluctuation cancellation torque command for cancelling transmission torque fluctuations transmitted from the internal combustion engine, and the current feedback control unit includes a harmonic controller that calculates the two-phase voltage commands by using a characteristic of a transfer function corresponding to a periodic function of a frequency of the transmission torque fluctuations.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2011-068144 filed on Mar. 25, 2011 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates to a control device used to control a rotating electrical machine that is drivably coupled to an internal combustion engine and that is drivably coupled to a wheel.DESCRIPTION OF THE RELATED ART[0003]For the above-described control device, for example, Japanese Patent Application Publication No. 2006-33969 (JP 2006-033969 A) describes a technique for causing a rotating electrical machine to output a torque for damping torque fluctuations that are transmitted from an internal combustion engine. At this time, a torque command intended for the rotating electrical machine is a torque command that is opposite in phase to the transmission torque fluctuations.[0004]In addition, in order to reduce a torque ripple...

AI Technical Summary

Benefits of technology

The patent is about a device that controls the output of a rotating electrical machine. Its purpose is to reduce the difference between the actual output torque and the desired command, while also minimizing the impact of noise.

Problems solved by technology

However, the control device for the rotating electrical machine uses a proportional-plus-integral (PI) controller such that DC current commands are tracked, so there occur a delay in response to the fluctuating commands.

Therefore, in JP 2006-033969 A, an actual output torque and actual currents respectively track the fluctuating torque command and the fluctuating current commands with a phase delay, and produce steady state deviations, with the result that a sufficient fluctuation damping effect and a sufficient torque ripple reduction effect may not be obtained.

In addition, in the technique described in JP 2004-64909 A, fluctuating command components are extracted by a high-pass filter, so there is a problem that the technique is weak in transient response and noise.

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